How to Fix Undefined Parser:parseFile method After Upgrading To 1.7.4.2

How to Fix Undefined Parser:parseFile method After Upgrading To 1.7.4.2 - 5.0 out of
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PrestaShop 1.7.4 released with the new features and improvement. As a PrestaShop theme developer, we have been trying to testing the latest version. But after upgrading from 1.7.3 to 1.7.4.2 when accessing the PrestaShop administration we are getting the following error:

Luckily, the solution to fix this is quite easy. But please note that this is PrestaShop 1.7.4.2 know issue and below fix is just a temporary fix, you should not directly change PrestaShop core file (override or create a plugin).

You can apply "How to fix Undefined Parser:parseFile method After Upgrade To 1.7.4.2" to fix it now and remove it after PrestaShop developers fix the core issue.